Yes, there are two accepted forms for possessive singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: Thomas'
Add an apostrophe s ('s) after the existing s at the end of the word: Thomas's
EXAMPLES
We're on our way to Thomas' party.
We're on our way to Thomas's party.
Note: The -s's is the most commonly used form, but if you are a student, use the form that is preferred by your teacher.
The correct spelling for the possessive form of "college" is "college's."
monies'
heroes
kids'
The possessive of scientist is scientist's (apostrophe S).
The singular possessive form is story's.
The possessive form for the noun dynasty is dynasty's.
Yes, pony's is the correct singular possessive form.example: The pony's stall was very clean.
The correct spelling of the possessive form of "people" is "people's."
contractor's
companies'
falcon's